diff --git a/plugins_auth_ldap.md b/plugins_auth_ldap.md
index aac10b3..18912e1 100644
--- a/plugins_auth_ldap.md
+++ b/plugins_auth_ldap.md
@@ -118,3 +118,4 @@ dn_template = "cn={user.firstname} {user.lastname},ou=user,{base_dn}"
 ### Other various configuration options
 Other optional configuration values include:
 * `search_dn`, where to search for users, default `ou=people,{base_dn}`
+* `group_dn`, where to search for groups, default `ou=group,{base_dn}`